At CES, Microsoft's CEO shows off new tablet, laptop running Windows and says 'only the imagination limits what can be done with Windows'

Microsoft CEO Steve Ballmer positioned Windows 7 as an operating system that can drive new and innovative products, as the company tries to fend off competition from tablet computers based on software from Google and Apple.

"Only the imagination limits what can be done with Windows PCs today," Ballmer said in his speech at the start of the Consumer Electronics Show in Las Vegas. "You can write on them, draw on them, hang them on the wall, touch them, use wireless keyboards, play a game and much, much more," he said.

Mini Guide to Madrid, Spain - Madrid has fantastic art galleries and beautiful plazas where cafés provide a front-row seat to the baroque architecture and energetic street life.

The city's divided into neighbourhoods: Los Austrias, Sol and Centro make up the medieval heart, while working-class Malasaña and Chueca are the fun, cultural districts.

Related article: Madrid and the art of tapas

See

The Museo del Prado's collection is like a window on the historical vagaries of the Spanish soul. All the great names of Spanish art can be found here, including Goya, Velázquez and Ribera (00 34 91 330 28 00; museodelprado.es; Paseo del Prado; 9am-8pm Tue-Sun; £7).